who is contributing to a huge infusion of cash, into the political committee opposing governor brown's proposition 30? this is even after state campaign finance regulators revealed the major source of funding for that tax measure, designed to help the schools. nanet miranda is in sacramento with the story. >> reporter: after a legal battle that almost ended up at the u.s. supreme court, the arizona-based americans for responsible leadership finally revealed who gave them that mystery their 11 million campaign contribution. >> they disclosed, an intermediary, the largest instance of money laundering in california history. >> reporter: in a letter, the money came from americans for job security, which funneled it to yet another nonprofit, center to protect patient right, before sending it to arl, arl sent it to the small business action committee pac in california, to use against governor brown's tax measure for schools, proposition 30, to win approval for proposition 32, which aims to curtail labor unions' political power. one of the groups is tied to david and charles koch, the billion